Which of the following is a maintenance activity for refrigeration systems?
A) Check the expansion valve
B) Check pilot gas regulator for proper flow
C) Check that the pilot is lit
D) Check purge gas for proper flow
Answer: A
Explanation: A) Correct. Check the expansion valve is a maintenance activity for refrigeration systems.
B) Incorrect. Check pilot gas regulator for proper flow is a maintenance activity for flare systems.
C) Incorrect. Check that the pilot is lit is a maintenance activity for flare systems.
D) Incorrect. Check purge gas for proper flow is a maintenance activity for flare systems.
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